Omni Block
Adon is one of the two characters in the game to have an Omni Block, a special kind of block where he can completely dodge unblockables and will not take chip from fireballs. The catch is that he can only do it for 11 frames at a time, making it function sort of like a parry. It can be useful to learn to time your blocks with Adon to go through Shotos' and Sagat's fireballs, and it's also great for dodging unblockable moves and can potentially get you out of normally inescapable situations, like against Eagle in the corner.
LK sideswitch against Shotos
if you're point blank VS. Shotos and they do an LP and you do an LK, you will teleport through them. Though it may seem like niche tech, it could be useful if you're point blank and the opponent fails a special input. It isn't known if it works on other characters yet. Here's a demonstration video: https://streamable.com/hq7i3k